Biden Chief of Staff Ron Klain Was 'Startled' by Octogenarian's Mental Decline Before Trump Debate: New Book

'Halfway through the session, the president excused himself and went off to sit by the pool,' according to book

New Book: Biden 'Demanded' Loyalty From Harris Campaign—'Whether She Won or Lost the Election'

Harris's team, meanwhile, fixated on the size of her chair

WATCH: MSNBC's Stephanie Ruhle Says Reaching Harris Was Like Using 'Pony Express'

Harris campaign manager said such claims are 'bulls—'

Biden-Harris Official Violated Federal Law by Operating Viral Pro-Kamala Misinformation Account on Gov't Time, Watchdog Complaint Alleges

Commerce Department official Ethan Wolf accused of violating Hatch Act through viral 'Kamala's Wins' account

'Moral Stain': Black Church Coalition Demands MSNBC Suspend Al Sharpton Over Undisclosed Kamala Harris Campaign Payments

Harris campaign's payment to Sharpton's group 'does not look good for a man supposed to represent integrity,' National Black Church Initiative says

'A Huge Misstep': Ilhan Omar Blames Harris Loss on Flaunting Liz Cheney Endorsement

These Four Democratic Firms Raked in $600 Million Running Ads for Kamala's Failed Campaign

Nearly 70 percent of the Harris campaign's known total spending went to just four media consulting firms

Psaki Savages Harris Support for Taxpayer-Funded Sex-Change Surgeries

'I don't know who supports that,' former White House press secretary says

It Wasn't Me: Joyful Biden Touts 'Historic Presidency' After Harris Humiliated

In break with Democrats and media allies, Sleepy Joe insists America is 'going to be OK'

The Trump Flex

Column: The promise and perils of a confident campaign